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Hydration of 1-phenyl-1-propyne in high-temperature water with catalysis by water-tolerant lewis acids / Rebacz, Natalie A. in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 535-540 Titre : Hydration of 1-phenyl-1-propyne in high-temperature water with catalysis by water-tolerant lewis acids Type de document : texte imprimé Auteurs : Rebacz, Natalie A., Auteur ; Phillip E. Savage, Auteur Année de publication : 2010 Article en page(s) : pp 535-540 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydration  phenyl  propyne  Water  tolerant  Lewis  acids. Résumé : We explore various aspects of alkyne hydration in high temperature water catalyzed by water-tolerant Lewis acids through experimentation with the hydration of 1-phenyl-1-propyne. Experiments comparing indium triflate, scandium triflate, ytterbium triflate, sulfuric acid, and hydrochloric acid indicate that indium triflate is the most active catalyst toward this reactive system of those tested. Experiments with quartz and stainless steel reactors in conjunction with quartz and stainless steel additive demonstrate that reactor material of construction has no appreciable effect upon the reaction. The reaction is first order in both catalyst and alkyne. We further determine the kinetic parameter k for four temperatures (150, 175, 200, and 225 °C), and find that the frequency factor is 108.8±0.3 L/(mol s) and the activation energy is 21.4 ± 0.6 kcal/mol for this transformation. This is the first example of alkyne hydration in high-temperature water catalyzed by water-tolerant Lewis acids. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9017513 [article] Hydration of 1-phenyl-1-propyne in high-temperature water with catalysis by water-tolerant lewis acids [texte imprimé] / Rebacz, Natalie A., Auteur ; Phillip E. Savage, Auteur . - 2010 . - pp 535-540. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 535-540 Mots-clés : Hydration  phenyl  propyne  Water  tolerant  Lewis  acids. Résumé : We explore various aspects of alkyne hydration in high temperature water catalyzed by water-tolerant Lewis acids through experimentation with the hydration of 1-phenyl-1-propyne. Experiments comparing indium triflate, scandium triflate, ytterbium triflate, sulfuric acid, and hydrochloric acid indicate that indium triflate is the most active catalyst toward this reactive system of those tested. Experiments with quartz and stainless steel reactors in conjunction with quartz and stainless steel additive demonstrate that reactor material of construction has no appreciable effect upon the reaction. The reaction is first order in both catalyst and alkyne. We further determine the kinetic parameter k for four temperatures (150, 175, 200, and 225 °C), and find that the frequency factor is 108.8±0.3 L/(mol s) and the activation energy is 21.4 ± 0.6 kcal/mol for this transformation. This is the first example of alkyne hydration in high-temperature water catalyzed by water-tolerant Lewis acids. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9017513